The S7-200 series relies on internal RAM/EEPROM rather than an MMC for core program storage, often requiring different steps. Siemens SiePortal Wipeout Utility : If the password is lost, you must use the Wipeout.exe utility command in STEP 7-Micro/WIN to reset the PLC to factory defaults. Universal Clear Password : In some cases, entering the override password
Sometimes, if the password is on the MMC, inserting a blank, formatted MMC into the CPU will force the CPU to stop. You can then try to load a blank project onto it. However, if the password is stored in the CPU's internal flash (which was common in setups from 2009+), this will not work. simatic s7 200 s7 300 mmc password unlock 2006 09 11